<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Terrain Surface Classification (Iwahashi and Pike)</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">22</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O.Conrad (c) 2012</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>Terrain surface classification as proposed by Iwahashi & Pike (2007).

Reference:
Iwahashi, J. & Pike, R.J. (2007): Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature. Geomorphology, Vol. 86, pp. 409?40
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Elevation </td><td>Grid (input)</td><td>DEM</td><td></td><td></td></tr><tr><td>Slope (*)</td><td>Grid (optional input)</td><td>SLOPE</td><td></td><td></td></tr><tr><td>Convexity (*)</td><td>Grid (optional input)</td><td>CONVEXITY</td><td></td><td></td></tr><tr><td>Texture (*)</td><td>Grid (optional input)</td><td>TEXTURE</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Landforms</td><td>Grid (output)</td><td>LANDFORMS</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Recalculate</td><td>Boolean</td><td>CONV_RECALC</td><td></td><td>Default: 0</td></tr><tr><td>Recalculate</td><td>Boolean</td><td>TEXT_RECALC</td><td></td><td>Default: 0</td></tr><tr><td>Number of Classes</td><td>Choice</td><td>TYPE</td><td></td><td>Available Choices:
[0] 8
[1] 12
[2] 16
Default: 2</td></tr><tr><td>Scale (Cells)</td><td>Integer</td><td>CONV_SCALE</td><td></td><td>Minimum: 1
Default: 10</td></tr><tr><td>Laplacian Filter Kernel</td><td>Choice</td><td>CONV_KERNEL</td><td></td><td>Available Choices:
[0] four-neighbourhood
[1] eight-neihbourhood
[2] eight-neihbourhood (distance based weighting)
Default: 0</td></tr><tr><td>Type</td><td>Choice</td><td>CONV_TYPE</td><td></td><td>Available Choices:
[0] convexity
[1] concavity
Default: 0</td></tr><tr><td>Flat Area Threshold</td><td>Floating point</td><td>CONV_EPSILON</td><td></td><td>Minimum: 0.000000
Default: 0.000000</td></tr><tr><td>Scale (Cells)</td><td>Integer</td><td>TEXT_SCALE</td><td></td><td>Minimum: 1
Default: 10</td></tr><tr><td>Flat Area Threshold</td><td>Floating point</td><td>TEXT_EPSILON</td><td>maximum difference between original and median filtered elevation (3x3 moving window) that still is recognized flat</td><td>Minimum: 0.000000
Default: 1.000000</td></tr></table>(*) <i>optional</i>